Summary
There was no correlation between the quantity of exopolysaccharide produced and acetylene reduction activity by Rhizobium spp. or by Bradyrhizobium spp. (Cajanus). The exopolysaccharide-defective mutants of Rhizobium sp. strain P 116 either failed to nodulate or showed a decrease in effectiveness. The deficiency in exopolysaccharide production was corrected by the addition of purified exopolysaccharide from the parent strain, or from Bradyrhizobium sp. strain P 149 or S24 isolated from pigeonpea (Cajanus cajan) and mungbean (Vigna radiata), respectively. However, the nodules so formed were not fully effective compared to those formed by the parent strain.
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Singh, S.K., Dudeja, S.S. & Khurana, A.L. Rhizobium sp. exopolysaccharide production, nodulation, and acetylene reduction activity (N2-fixation) in pigeon pea (Cajanus cajan L.). Biol Fertil Soils 11, 30–33 (1991). https://doi.org/10.1007/BF00335830
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DOI: https://doi.org/10.1007/BF00335830